Q4: Quaternions
In heike/rotations: Tools for working with rotational data

Description Usage Arguments Details Value See Also

Create a unit quaternion

  Q4(U, ...)

  ## Default S3 method:
 Q4(U, theta = NULL)

  ## S3 method for class 'SO3'
 Q4(R)

`U`	three-dimensional vector describing the fix axis of the rotation
`...`	additional arguments

Create quaternion representing the rotation of the identity matrix about the axis U throught the angle theta. This can be accomplished by providing the axis and angle explicitly or by providing the rotation in some other form, e.g. a matrix in SO(3) or Euler angles.

unit quaternion of class "Q4"

NULL

Other Q4: as.Q4, id.Q4, Q4-class